PHP开发框架Yii Framework教程(8) 使用FormModel

class LoginForm extends
CFormModel    
{    
    public $username;    
    public $password;    
    public $rememberMe=false;    
}

class LoginForm extends CFormModel    
{    
    public $username;    
    public $password;    
    public $rememberMe=false;    
        
    private $_identity;    
        
    public function rules()    
    {    
        return array(    
            array('username, password', 'required'),    
            array('rememberMe', 'boolean'),    
            array('password', 'authenticate'),    
        );    
    }    
        
    public function authenticate($attribute,$params)    
    {    
        $this->_identity=new UserIdentity($this->username,    
              $this->password);    
        if(!$this->_identity->authenticate())    
            $this->addError('password','错误的用户名或密码。');    
    }    
}

array('AttributeList', 'Validator',
'on'=>'ScenarioList', ...附加选项)

/**   
 * @param string 所要验证的特性的名字   
 * @param array 验证规则中指定的选项   
 */
public function ValidatorName($attribute,$params) { ... }

// 用户名为必填项    
array('username', 'required'),    
// 用户名必须在 3 到 12 个字符之间    
array('username', 'length', 'min'=>3, 'max'=>12),    
// 在注册场景中，密码password必须和password2一致。    
array('password', 'compare', 'compareAttribute'=>'password2', 'on'=>'register'),    
// 在登录场景中，密码必须接受验证。    
array('password', 'authenticate', 'on'=>'login'),

foreach($_POST
['LoginForm'] as $name=>$value)    
{    
    if($name 是一个安全的特性)    
        $model->$name=$value;    
}

// 在登录场景中    
$model=new User('login');    
if(isset($_POST['User']))    
    $model->attributes=$_POST['User'];    
        
// 在注册场景中    
$model=new User('register');    
if(isset($_POST['User']))    
    $model->attributes=$_POST['User'];

array('content', 'safe')

array ('permission', 'unsafe')

public function safeAttributes()    
{    
    return array(    
        parent::safeAttributes(),    
        'login' => 'username, password',    
    );    
}safeAttributes 方法更准确的返回值应该是如下结构的 :
array(    
   // these attributes can be massively assigned in any scenario    
   // that is not explicitly specified below    
   'attr1, attr2, ...',    
     *    
   // these attributes can be massively assigned only in scenario 1    
   'scenario1' => 'attr2, attr3, ...',    
     *    
   // these attributes can be massively assigned only in scenario 2    
   'scenario2' => 'attr1, attr3, ...',    
)

'attr1, attr2, ...'

$model->permission='admin';    
$model->id=1;4. 触发验证

// 在注册场景中创建一个  User 模型
。等价于：    
// $model=new User;    
// $model->scenario='register';    
$model=new User('register');    
        
// 将输入的值填充到模型    
$model->attributes=$_POST['User'];    
        
// 执行验证    
if($model->validate())   // if the inputs are valid    
    ...    
else
    ...规则关联的场景可以通过规则中的 on 选项指定。如果 on 选项未设置，则此规则会应用于所有场景。例如：
public function rules()    
{    
    return array(    
        array('username, password', 'required'),    
        array('password_repeat', 'required', 'on'=>'register'),    
        array('password', 'compare', 'on'=>'register'),    
    );    
}

public function actionLogin()    
{    
    $model=new LoginForm;    
    // collect user input data    
    if(isset($_POST['LoginForm']))    
    {    
        $model->attributes=$_POST['LoginForm'];    
        // validate user input and redirect to the previous page if valid    
        if($model->validate() && $model->login()){    
        
            $this->render('index');    
            return;    
        }    
    }    
    // display the login form    
    $this->render('login',array('model'=>$model));    
}

/**   
 * @var string sets the default action to be 'login'   
 */
public $defaultAction='login';

/**   
 * UserIdentity represents the data needed to identity a user.   
 * It contains the authentication method that checks if the provided   
 * data can identity the user.   
 */
class UserIdentity extends CUserIdentity    
{    
    /**   
     * Authenticates a user.   
     * The example implementation makes sure if the username and password   
     * are both 'demo'.   
     * In practical applications, this should be changed to authenticate   
     * against some persistent user identity storage (e.g. database).   
     * @return boolean whether authentication succeeds.   
     */
    public function authenticate()    
    {    
        $users=array(    
            // username => password    
            'demo'=>'demo',    
            'admin'=>'admin',    
        );    
        if(!isset($users[$this->username]))    
            $this->errorCode=self::ERROR_USERNAME_INVALID;    
        else if($users[$this->username]!==$this->password)    
            $this->errorCode=self::ERROR_PASSWORD_INVALID;    
        else
            $this->errorCode=self::ERROR_NONE;    
        return !$this->errorCode;    
    }    
}

$model->attributes=$_POST ['LoginForm'];

$model->username=$_POST['LoginForm']['username'];
$model->password=$_POST ['LoginForm']['password'];
$model->rememberMe=$_POST['LoginForm'] ['rememberMe'];

CHtml::textField($name,$value,array('submit'=>''));

<center class="form">    
<?php echo CHtml::beginForm(); ?>    
    <?php echo CHtml::errorSummary($model); ?>
    <center class="row">
        <?php echo CHtml::activeLabel($model,'username'); ?>    
        <?php echo CHtml::activeTextField($model,'username') ?>    
    </center>
    <center class="row">    
        <?php echo CHtml::activeLabel($model,'password'); ?>    
        <?php echo CHtml::activePasswordField($model,'password') ?>    
    </center>
    <center class="row rememberMe">    
        <?php echo CHtml::activeCheckBox($model,'rememberMe'); ?>    
        <?php echo CHtml::activeLabel($model,'rememberMe'); ?>    
    </center>
    <center class="row submit">    
        <?php echo CHtml::submitButton('Login'); ?>    
    </center>
<?php echo CHtml::endForm(); ?>    
</center><!-- form -->

<center class="form">    
<?php $form=$this->beginWidget('CActiveForm'); ?>    
         
    <?php echo $form->errorSummary($model); ?>    
         
    <center class="row">    
        <?php echo $form->label($model,'username'); ?>    
        <?php echo $form->textField($model,'username') ?>    
    </center>    
         
    <center class="row">    
        <?php echo $form->label($model,'password'); ?>    
        <?php echo $form->passwordField($model,'password') ?>    
    </center>    
         
    <center class="row rememberMe">    
        <?php echo $form->checkBox($model,'rememberMe'); ?>    
        <?php echo $form->label($model,'rememberMe'); ?>    
    </center>    
         
    <center class="row submit">    
        <?php echo CHtml::submitButton('Login'); ?>    
    </center>    
         
<?php $this->endWidget(); ?>    
</center><!-- form -->